Abrading machine



July 12, 1932 B. w. FREEMAN ET AL 1,866,848

ABRADING MACHINE Filed Jan. 18. 1929 'l isiniiiiwi 11 l www L www u1u/15INVENTORS BY OM w m7,@

A TTORNEYJ` Patented July 12, 1932 UNITED sT .:.TE.s

PATENT OFFICE BENJAMIN W. FREEMAN AND LOUIS G. FREEMAN, OF CINCINNATI,OHIO, AND PAUL H. KOPLIN, OF MILWAUKEE, WISCONSIN, ASSIGNORS T0 LOUIS G.FREEMAN COMPANY, OF CINCINNATI, OI'IO, A CORPORATION OF OHIO Y YABRADING MACHINE Y Applation filed .Iailuary 18, 1929. Serial No.333,375.

Our invention relates to abrading, buiiing and scouring machines andguards therefor of the belt type, in which -the article tobe abraded ismoved into contact with an abrading Web carried on a belt, and whichtype of machine has been particularly developed for use in shoemanufacture for 4heel breast scouring. l l

In the art therehas been developed an abrading machine in Which thereare a seriesof guiding rollers over which an abrading belt passes.`Strips of abrading material such as emery cloth or sandpaper aresupported by a sub-belt and the article to be abraded is held in Contactwith the abrading Web. In the instance Where the operator of the machinedesires, for example, to abrade the heel breast of a shoe, the shoe isbrought into contact with the abra-ding belt in the position on themachine in which the belt passes over a guiding fixture shaped orarranged to give the desired curvature. Such a machine is fullydescribed in the Louis G. Freeman Patent No. 1,244,310 of October 23,1917.

It often happens in abrading v shoe heel breasts that the shoe contactswith the edge of the abrasive belt or subbelt and the surface of theshankof the shoe is marred. While injury may result from the abradingbelt edge, it also frequently happens that the edge of the sub-belt orcarrying belt either seems to make an oily mark on the leather, or seemsto burn the leather by frictional contact so. that the subsequentremoval of the marks is very diihcult and needs an added operation.

It is one object of our invention to provide a guard for an abradingmachine which will be particularly useful in the shoe industry forpreventing the marring ofv parts of the shoe other than those which itis designed to abrade. Another object is the provision of a guard which,being resiliently mounted, will properly locate itself with reference tothe sub-belt and abrading belt and the shoe bottom. A further object isthe provision of a guard which enables the operator to perform theabrading operation more neatly and with less effort, and WhichV alsoenables him to greatly increase the quantity of Work Which he canperform on the machine, as he can exert the necessary pressure of theshoe against the belt Withoutfear of injury to the shoe.

.The above and other objects to Which reference Will be made in theensuing disclosure We accomplish by that certain combination andarrangement of parts of which We have shown a preferred modification.

- Referring to the drawing:

Figure lisa perspective view of the head.

, Figure 7 isa front elevation of the `guard l shown from the sideopposite that from which the view in Figure 5 Was made.

Mounted on the frame supporting members 1 there is an arcuately slottedportion 2 on which a bracket 3 is adjustably mounted. On the bracketthere are journaled the pulleys 4 and ,V which ordinarily are notdriven. Also mounted on'a bracket 6 We have shown the idler pulley 7which is also adjustably mounted. The drive forthe pulleys may beprovided in any desired Way. The pulley 8, for example, may be mountedon a shaft 9 which has another driving pulley on the sideV of themachine not illustrated, driven by a belt from a suitable source ofpower such as an electric motor.

Passing over the pulleys and over the guiding fixture comprising aseries of small rollers 11 and the end support 12, We have shown thesub-belt 13 on the outer surface of which there is supported theabrasive belt 14. By adjusting the position of the idler pulley? thecarrying belt may be tensioned as desired so as to support the abrasivebelt in a proper state of tension. We havenot described the constructionof the machine in any great detail as the type of machine which isequipped withour guard is only illustrative of the type of machine withwhich our invention is adapted to be used.

The fixture has a body 15 having a shank 16 by which the body may besupported in the machine frame. The body and shank, in the particularmodification described, are shown as the mounting vfor the rollers 11,end support 12 and for the guard, although it will be apparent that theguard might have an independent mounting. The rollers 11 are mounted onspindles 17 which extend from the body 15 to the end support 12. An oilwell 18 is also shown which lubricates the bearings of the rollers.

Referring particularly to Figure 5, we have shown the flexible orresilient plate 19 which is mounted with screws 20 on a pair of rods2.1. The mounting for the plate allows for longitudinal movement and theplate is preferably constructed of material which will allow it to giveto adjust itself to the varying thicknesses of the belts. The rods passthrough openings 22 in the end support and a support 23 extends acrossbelow the end support and limits the outward travel of the guard plate19. Tubular supports 24 extend up froml the base plate 15 and slidablyretain the ends of piston rods 25 which are tensioned to springoutwardly by means of the springs 26.

In use, in former practice the abrading belt was of such width as tousually extend over a portion of the rollers and the end support 12. Noprovision was made, however, to prevent the over-running of the sub-beltin handling the shoe so that the side edge of the sub-belt would oftencome into contact with the shank of the shoe. The guard plate, it willbe noted, extends out beyond the edge of the end support so that in ournovel guard it is substantially impossible for the carryin belt to come.into contact with the shank o the shoe and causing stain like marksthereon. Further, when the shoe is held against the abrading belt toscour the heel breast, as indicated in Figures 2 and 3, the ,guard platewill enable the operator to exert the proper pressure on the shoewithout danger of mar ring the shank by a mark made by the carryingbel-t, and since the simplicity of the operation .is increased, thevolume of work he can do is also greatly increased. It will further beobserved that the guard plate, being resilient itself, will gi vesufficiently to accommodate itself for varying thicknesses of belts. pIt can at the same time allow for suiiicient distortion to permit theabrading belt normally about one sixteenth inch thick to be worked-cl'ear down into the :heel breast line.

- While we :have only shown lone specific embodiment orf our invention,there are many modifications which incorporate the principle involved,such as iixedly mounting the resilient guard plate or providing anonflexible guard, and which thus come within the scope of ourinvention.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent, is

l. In combinationv for use in an abrading machine having an abradingbelt and a carrying belt therefor, a guard constructed and arranged toextend over the edge of said carrying'belt and substantially to theplane of the rear surface of the abrading belt and to thereby provide aguard to prevent inadvertent injury to the work by Contact with an edgeof said carrying belt.

2. In combination for use in an abrading machine having an abrading beltand a carrying belt therefor, a guard having an edge extending outsubstantially to the plane of the abrading surface of the abrading beltand thereby providing a guard to prevent inadvertent injury to the workby contact with an edge of said carrying belt, said guard comprising aflexible plate and the edge thereof contoured to correspond to the curveof said belts.

3. In combination for use in an abrading machine having an abrading beltandl a carrying belt therefor, a guard constructed and arranged toextend out substantially to the plane of the abrading surface of theabrading belt and to thereby provide a guard to prevent inadvertentinjury to the work by contact with an edge of said carrying belt, saidguard comprising a plate mounted for resilient movement in the plane ofsaid belts.

4. In combination for use in an abrading machine having an abrading beltand a carrying belt therefor, a guard constructed and arranged with anedge extending out substantially to the plane of the abrading surface ofthe abrading belt and to thereby pro vide a guard to prevent inadvertentinjury to the work by contact with an edge of said carrying belt, saidguard comprising a iexible plate mounted for movement in the plane ofsaid belts.

5. An abrading machine having an abrad- Y ing belt, and means forguarding an edge of said belt to prevent inadvertent injury 'to work bysubstantial Contact with said edge, said guarding means extending overan edge of the belt and substantially to the plane of the abradingsurface and being shaped so as to protect the shank of a shoe during aheel breast scouring operation.

6. An abrading machine having an abrad ing belt and means for guardingan edge of said belt to prevent inadvertent injury to work bysubstantial Contact with said edge, and means for resiliently mountingsaid .edge guarding means for movement in the plane of said belt.

7. An abrading machine having an abrading belt and means for guarding anedge of said belt to prevent inadvertent injury to work by substantialcontact with said edge, said guarding means comprising a iexible platemounted for movement in the plane of said belt.

8. An abrading machine having an abrading belt and means for guarding anedge of said belt to prevent inadvertent injury to work by substantialcontact with said edge, said guarding means comprising a flexible plate,said plate having a resilent mounting suiiiciently removed from theportion thereof guarding said belt edge as to allow distortion of saidplate with the pressure of work thereagainst.

9. In combination for use in an abrading machine having an abradingbelt, a fixture comprising a series of rollers arranged so as to havetheir peripheral surfaces prescribe an arc over which said belt isguided, an end support having an arcuate surface aligned with the arc ofthe peripheries of the rollers, and guarding means resiliently mountedon said support and having a contoured edge at least partiallyoverlapping an edge of said belt thereby to prevent contact between therear portion of the belt and the work.

10. In combination for use in an abrading machine having an abradingbelt, a fixture comprising a series of rollers arranged so as to havetheir peripheral surfaces prescribe an arc over which said belt isguided, an end support having an arcuate surface aligned with the arc ofthe peripheries of the rollers, and guarding means extendingsubstantially to the plane of the peripheral surface of said belt, saidmeans comprising a flexible late.

p 11. In combination for use in an abrading machine having an abradingbelt, a fixture comprising a series of rollers arranged so as to havetheir peripheral surfaces prescribe an arc over which said belt isguided, an end support having an arcuate surface aligned with the arc ofthe peripheries of the rollers, and guarding means mounted so as tooverhang said support, said means comprising a resiliently supportedflexible plate.

12. In combination in an abrading machine having a continuous abradingbelt, a series of rollers arranged so as to have their peripheralsurfaces prescribe an arc over which said belt passes, an end supporthaving an arcuate surface aligned with the arc of the peripheries of therollers, and resiliently mounted guarding means mounted so as tooverhang said guide and spaced from the edge of said support.

13. In combination in an abrading machine having a continuous abradingbelt, a series of rollers arranged so as to have their peripheralsurfaces prescribe an arc over which said belt passes, an end supporthaving an arcuate surface aligned withV the arc of the peripherieslofthe rollers, and guarding-means mounted so as to cooperate with saidsupport,'said"guarding means comprising a thin resiliently mounted plateshaped sp1 asto conform tothe heel breast line of a sce... t

:114. A heel breast scouring machine having an abrading belt, said :belthaving an outer undercut edge, means over which said belt passes tocontrol the arcof movement .of said belt, and guarding means spaced fromsaidv means and extending out in alignment with andv partially over saidundercut ed e of the belt', said guarding means being of t in crosssectionaldimensions so as to permit access offsa-id. abrading belt closeto the position occupied by said guarding means.

15..,In vcombination for use with a heel breast scouring ymachine havingan abrading belt, a fixture over which said belt passes to control thearc of movement of said belt, said belt having an outer undercut edge,guarding means extending out in alignment with and partially over saidundercut edge of the belt, said guarding means composing a part of saidfixture and being shaped so as to iit down closely into the groove atthe base of a heel so as to permit the thorough abrading of the entiresurface of the heel breast during an abrading operation.

16. In combination for use with a heel breast scouring machine havin anabrading belt, a ixture over which saidllielt passes to control the arcof movement of said belt, guarding means spaced form and overhanging anedge of said belt, and resilient means for mounting said guarding means.

17. A heel breast scouring machine having an abrading belt, means overwhich said belt passes to control the arc of movement of said belt,guarding means overhanging an edge of said belt, and resilient means formounting said guarding means, said guarding means spaced from an edge ofsaid belt, and comprising a flexible plate extended at an obtuse angleto the plane of the belt.

18. A fixture for controlling the arc of movement of a heel breastscouring belt comprising a base, an end support spaced from said base,and rollers mounted between the base and support, said rollers beingmounted in an arcuate plane, and a flexible plate mounted on said baseand extending in spaced over-depending position at an obtuse angle tothe surfaces of said end support, said plate providing an edge guard fora scouring belt passing over said device.

19. A fixture for controlling the arc of movement of a heel breastscouring belt comprising a base, an end support spaced from said base,and rollers mounted between the base and support, said rollers beingmounted in an arcuate plane, and a plate mounted on said base andextending in gpg p tuse angaetothe surf ei nfsad end; suppart, said'prate providing an. edge, guand, for a scouring' beh: passiz'xg' overdeviser said, 5 piste having' areshent 20. fixture for eontrolsking theam at movement of av heel breast scourmg belt am :n base, an end supportspaced from saidy base and. roklers mnunted between. the '1U base andasupport, said rollers beilg mounted in m arcuate. plane, and a; exible'plate mounted on said. base and extending spaeed overdependng positionat; am obtuse angle A to the. surface ci said end seid plate I5providing an edge-Aey guard for a. scaurng belty passing ovex'- saiddevice, smid plaie a periphery shaped to follow the heel.' breast lineof a shoe, BENJAMIN W., 'mi LOUES G; FREEMAN.. v

BAEL KOPLIN.

